I'm not sure what's going on or why. But my computer has been locking up while in EQ at very inopportune times over the last two weeks.
It freezes with no keyboard or mouse function. The only option I have is press and hold the power button until it shuts off and then restarting.
It happened twice during the raid last night. But it not zone or instance specific. It has happened on raids and it happened in Shards Landing.
It has only happened while EQ is running.
Someone mentioned possible relation to UI but I don't think so. The only difference with my UI is the spell gems. I copy all files from the default folder into a hybrid folder and then copy the old spell gems to overwrite the new ones. I update this with every patch.

I've had the same issue. Grouping...all was okay...then it's like a huge lag spike lasting several seconds. I could wait it out, but once or twice my connection timed out while waiting and I had no choice but to reboot. I know my MB sound is glitchy, but I can't believe that's at all related. Not sure what the problem is, sorry.

These are no lag spikes. It happened again during Vim & Vigor when they were about 85%. I let it sit for several minutes to see if it would recover.
I tried windows update and a full virus scan after I rebooted. I spent some time looking at the system event log, but didn't really know what to look for.

wtf does logging in have to do with a hard crash issue?
lol, dang thread poachers.

Benasis asked me a potentially relevant question yesterday. Asked me if my CPU fan was working and indeed it is not.
If the fan was the issue I should have it replaced today. If the replacement won't spin I may have to hire Goofy to blow on it.

If the CPU is/was overheating, I can certainly see the machine getting cranky in a big way.

BUT, I would also expect it to happen outside EQ, and, frankly, within EQ a lot more frequently than it is. Signs of failed cooling usually show up within a few minutes. Not randomly a few times a week. (Although, I guess the heat-sink is still there, maybe it is sufficient 'most of the time'. Guess we'll see.)

Small town computer repair shop - "I'm going out of town. I'll leave it in the mailbox. You can pay me later."
Unfortunately i needed an 80mm fan and what he left me was a 90mm fan. I can't mount it but it's sitting there blowing on the CPU until the one I ordered arrives.